“When you have the moisture and then the high temperatures, not only does the virus replicate faster but then you also have mosquitoes that are completing their life cycle faster, which means we just have more mosquitoes,” she says.

The number of mosquitoes showing up in the district’s traps is the highest it’s been in a long time.

There’s been one human case of the virus reported so far in Sacramento County.

Amy came to Sacramento from New Hampshire Public Radio (NHPR) where she was Environment Reporter. Amy has also reported for NPR member stations WFAE in Charlotte, WAMU in Washington D.C. and American Public Media's "Marketplace." Read Full Bio